Use of in-cylinder pressure measurement and the response surface method for combustion feedback control in a diesel engine

Abstract

An engine control algorithm was designed and implemented on a heavy-duty diesel engine. The goal was to develop a control system that could adjust split injection parameters to accommodate changes in operating parameters such as fuel and ambient air conditions, and mechanical wear during engine operation. An in-cylinder pressure transducer was chosen for the closed-loop feedback signal to be used in conjunction with the control algorithm. The control algorithm incorporated a version of the response surface method (RSM) to adjust the fuel injection parameters and to locate the optimum settings. Optimizations of double injections at 821 r/min and 25 per cent load and 0, 15, and 30 per cent exhaust gas recirculation (EGR) were first performed using a combination of the genetic algorithm (GA) and the RSM to provide baseline cylinder pressure data and to develop control criteria. These optima were then used to calibrate the control system by providing target values for the RSM control algorithm. Tests were conducted using a heat release estimate to control heat release phasing and magnitude. The control algorithm was able to adjust the timing of the first and second injections, as well as the amount of fuel injected in each pulse to phase combustion properly.

Keywords

RSM algorithm combustion injection timing

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References

Montgomery

D. T.

An investigation into optimization of heavy-duty diesel engine operating parameters when using multiple injections and EGR, PhD Dissertation, Department of Mechanical Engineering, University of Wisconsin-Madison, 2000.

Thiel

M. P.

Application of automated experiments to the optimization of a heavy-duty direct-injected diesel engine for the simultaneous reduction of NOx and particulate emissions, MS Thesis, Department of Mechanical Engineering, University of Wisconsin-Madison, 2002.

Montgomery

D. T.

Reitz

R. D.

Effects of multiple injections and flexible control of boost and EGR on emissions and fuel consumption of a heavy-duty diesel engine. SAE paper 2001-01-0195, 2001.

Montgomery

D. T.

Reitz

R. D.

Six mode cycle evaluation of the effect of eGR and multiple injections on particulate and NOx emissions from a DI diesel engine. SAE paper 960316, 1996.

Klingbeil

A. E.

Particulate and NOx reduction in a heavy-duty diesel engine using high levels of exhaust gas recirculation and very early or very late start of injection, MS Thesis, Department of Mechanical Engineering, University of Wisconsin-Madison, 2002.

von der Ehe

J. K.

Closed-loop feedback control of a heavy-duty diesel engine for emissions reduction, MS Thesis, Department of Mechanical Engineering, University of Wisconsin-Madison, 2004.

Randolph

Methods of processing cylinder-pressure transducer signals to maximize data accuracy. SAE paper 900170, 1990.

Johnson

W. P.

S. C.

Oppenheim

A. K.

Potential for closed loop air-fuel ratio management of a diesel engine. SAE paper 1999-01-0517, 1999.

Haraldsson

Tunestal

Johansson

HCCI closed-loop combustion control using fast thermal management. SAE paper 2004-01-0943, 2004.

10.

Zhu

G. G.

Daniels

C. E

Winkleman

MBT timing detection and its closed-loop control using in-cylinder pressure signal. SAE paper 2003-01-3266, 2003.

11.

Sellnau

M. C.

Matekunas

E. A.

Battiston

P. A.

Chang

C. E

Lancaster

D. R.

Cylinder-pressure-based engine control using pressure-ratio-management and low-cost non-intrusive cylinder pressure sensors. SAE paper 2000-01-0932, 2000.

12.

Mobley

Non-intrusive in-cylinder pressure measurement of internal combustion engines. SAE paper 1999-01-0544, 1999.

13.

Iorio

Giglio

Police

Rispoli

Methods of pressure cycle processing for engine control. SAE paper 2003-01-0352, 2003.

14.

Stobart

R. K.

Challen

B. J.

Bowyer

Electronic controls — breeding new engines. SAE paper 2001-01-0255, 2001.

15.

Schiefer

Maennel

Nardoni

Advantages of diesel engine control using in-cylinder pressure information for closed loop control. SAE paper 2003-01-0364, 2003.